Aha! That is the special TM swing-away tongue. A wonderful invention for those who need it, including me. On the other hand, it is kind of expensive, and adds some weight. My feeling is that if you don't need it, don't get it. Others will disagree, however, using a valid argument about resale value. When you go to sell your TM a few years down the road, you'll have a slightly larger group of potential buyers if you have the swing-away tongue. Your choice.
Just to round out the story, the thing we usually call the "hitch" is the BIG steel thing that slides into the "hitch receiver". The receiver is the 2" square steel tube that is permanently mounted on the back of your tow vehicle. The hitch ball is mounted on a part of the hitch called the "ball mount". You can see pictures of all these parts by rummaging around at
http://www.drawtite-hitches.com/WD/w...stribution.htm.
Finally, at the very front of the trailer, the cup that drops over the ball is called the "coupler".
Bill